/*

* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  

*          Phonebook activation view transaction implementation definition.

*

*/

// INCLUDE FILES

#include    "CViewActivationTransactionImpl.h"

#include    <aknnavi.h>     // CAknNavigationControlContainer

#include    <aknnavide.h>   // CAknNavigationDecorator

#include    <akntabgrp.h>   // CAknTabGroup

#include    <akntitle.h>    // CAknTitlePane

#include    <akncontext.h>  // CAknContextPane

#include    <eikimage.h>    // CEikImage

#include    <DigViewGraph.h>

#include    "CPbkViewNavigator.h"

// ================= MEMBER FUNCTIONS =======================

CPbkAppUi::CViewActivationTransactionImpl* CPbkAppUi::CViewActivationTransactionImpl::NewLC

        (CPbkAppUi& aAppUi, 

        const TUid& aViewId, const TVwsViewId& aPrevViewId,

        const TDesC* aTitlePaneText, 

        const CEikImage* aContextPanePicture,

        TUint aFlags)

    {

    // Create object. new(ELeave) resets all members to zero.

    CViewActivationTransactionImpl* self = new(ELeave)

		CViewActivationTransactionImpl(aAppUi, aViewId, aPrevViewId, aFlags);

    CleanupStack::PushL(self);

	self->ConstructL(aTitlePaneText, aContextPanePicture);

    return self;

    }

CPbkAppUi::CViewActivationTransactionImpl::CViewActivationTransactionImpl

		(CPbkAppUi& aAppUi, const TUid& aViewId, const TVwsViewId& aPrevViewId,

		TUint aFlags) : iAppUi(&aAppUi), iViewId(aViewId),

		iPrevViewId(aPrevViewId), iFlags(aFlags)

	{

	}

void CPbkAppUi::CViewActivationTransactionImpl::ConstructL

		(const TDesC* aTitlePaneText, const CEikImage* aContextPanePicture)

	{

    // Make changes to state and save rollback data

    UpdateViewNavigationState();

	if (iFlags & EUpdateNaviPane) 

        {

        UpdateNaviPaneL(iViewId);

        }

    if (iFlags & EUpdateTitlePane)

        {

        SetTitlePaneTextL(aTitlePaneText);

        }

    if (iFlags & EUpdateContextPane)

        {

        SetContextPanePictureL(aContextPanePicture);

        }

	}

CPbkAppUi::CViewActivationTransactionImpl::~CViewActivationTransactionImpl()

    {

    // Undo changes in reverse order

    if (iSaveContextPanePicture)

        {

        // iContextPane takes ownership of iSaveContextPanePicture

        iContextPane->SetPicture(iSaveContextPanePicture);

        }

    if (iSaveTitlePaneText)

        {

        // iTitlePane takes ownership of iSaveTitlePaneText

        iTitlePane->SetText(iSaveTitlePaneText);

        }

    if (iPushedNaviDecorator)

        {

        iAppUi->NaviPane()->Pop(iPushedNaviDecorator);

        }

    if (iTabGroup)

        {

        iTabGroup->SetActiveTabByIndex(iSaveTabIndex);

        }

    if (iSavePreviousViewNode)

        {

        CDigViewNode* activatedNode = 

            iAppUi->iViewGraph->FindNodeWithViewId(iViewId);

        activatedNode->SetPreviousNode(iSavePreviousViewNode);

        }

    }

void CPbkAppUi::CViewActivationTransactionImpl::Commit()

    {

    // Delete and reset all rollback data

    delete iSaveContextPanePicture;

    iSaveContextPanePicture = NULL;

    delete iSaveTitlePaneText;

    iSaveTitlePaneText = NULL;

    iPushedNaviDecorator = NULL;

    iTabGroup = NULL;

    iSavePreviousViewNode = NULL;

    }

void CPbkAppUi::CViewActivationTransactionImpl::UpdateViewNavigationState()

    {

    // Reset saved state

    iSavePreviousViewNode = NULL;

    // Find activated view node in the graph

    CDigViewNode* activatedNode = 

        iAppUi->iViewGraph->FindNodeWithViewId(iViewId);

    if (activatedNode)

        {

        // Set previous node for the newly activated view

        if (iAppUi->IsPhonebookView(iPrevViewId))

            {

            // Find the previous view in the graph

            CDigViewNode* prevNode = 

                iAppUi->iViewGraph->FindNodeWithViewId(iPrevViewId.iViewUid);

            while (prevNode)

                {

                // Get transitions from the new view

                const TInt count = activatedNode->TransitionCount();

                TInt i;

                for (i = 0; i < count; ++i)

                    {

                    // Set previous view if there is a back transition

                    if (activatedNode->TransitionAt(i).iEvent == EPbkViewTransitionBack && 

                        activatedNode->TransitionAt(i).iNode == prevNode)

                        {

                        iSavePreviousViewNode = activatedNode->PreviousNode();

                        activatedNode->SetPreviousNode(prevNode);

                        break;

                        }

                    }

                if (i >= count)

                    {

                    // Matching back transition not found: Move back in 

                    // previous view chain

                    prevNode = prevNode->PreviousNode();

                    }

                else

                    {

                    // Transition found, exit while loop

                    break;

                    }

                }

            }

        else

            {

            iSavePreviousViewNode = activatedNode->PreviousNode();

            activatedNode->SetPreviousNode(activatedNode->DefaultPreviousNode());

            }

        }

    }

void CPbkAppUi::CViewActivationTransactionImpl::UpdateNaviPaneL(TUid aViewId)

    {

    // Reset saved state

    iPushedNaviDecorator = NULL;

    iTabGroup = NULL;

    iSaveTabIndex = 0;

    CAknNavigationDecorator* decorator= 

        iAppUi->iViewNavigator->TabGroupFromId(aViewId.iUid);

    if (decorator)

        {

        CAknTabGroup* tabGroup = static_cast<CAknTabGroup*>

            (decorator->DecoratedControl());

        if (iAppUi->NaviPane()->Top() != decorator)

            {

            iAppUi->NaviPane()->PushL(*decorator);

            iPushedNaviDecorator = decorator;

            }

        iTabGroup = tabGroup;

        iSaveTabIndex = tabGroup->ActiveTabIndex();

        tabGroup->SetActiveTabById(aViewId.iUid);

        }

    }

void CPbkAppUi::CViewActivationTransactionImpl::SetTitlePaneTextL

        (const TDesC* aTitlePaneText)

    {

    // Reset saved state

    iSaveTitlePaneText = NULL;

    CEikStatusPane* statusPane = iAppUi->StatusPane();

    if (statusPane)

        {

        if (statusPane->PaneCapabilities(TUid::Uid(EEikStatusPaneUidTitle)).IsPresent())

            {

            iTitlePane = static_cast<CAknTitlePane*>

                (statusPane->ControlL(TUid::Uid(EEikStatusPaneUidTitle)));

            if (iTitlePane->Text())

                {

                iSaveTitlePaneText = iTitlePane->Text()->AllocL();

                }

            if (aTitlePaneText)

                {

                iTitlePane->SetTextL(*aTitlePaneText);

                }

            else

                {

                iTitlePane->SetTextToDefaultL();

                }

            }

        }

    }

CEikImage* CPbkAppUi::CViewActivationTransactionImpl::CopyL(const CEikImage& aSrc)

    {

    CEikImage* copy = new(ELeave) CEikImage;

    CleanupStack::PushL(copy);

    copy->SetPictureOwnedExternally(EFalse);

    CFbsBitmap* bitmap = new(ELeave) CFbsBitmap;

    copy->SetBitmap(bitmap);

    CFbsBitmap* mask = new(ELeave) CFbsBitmap;

    copy->SetMask(mask);

    User::LeaveIfError(bitmap->Duplicate(aSrc.Bitmap()->Handle()));

    User::LeaveIfError(mask->Duplicate(aSrc.Mask()->Handle()));

    CleanupStack::Pop();  // copy

    return copy;

    }

void CPbkAppUi::CViewActivationTransactionImpl::SetContextPanePictureL(const CEikImage* aContextPanePicture)

    {

    // Reset saved state

    iSaveContextPanePicture = NULL;

    CEikStatusPane* statusPane = iAppUi->StatusPane();

    if (statusPane)

        {

        if (statusPane->PaneCapabilities(TUid::Uid(EEikStatusPaneUidContext)).IsInCurrentLayout())

            {

            iContextPane = static_cast<CAknContextPane*>

                (statusPane->ControlL(TUid::Uid(EEikStatusPaneUidContext)));

            iSaveContextPanePicture = CopyL(iContextPane->Picture());

            if (aContextPanePicture)

                {

                iContextPane->SetPicture(CopyL(*aContextPanePicture));

                }

            else

                {

                iContextPane->SetPictureToDefaultL();

                }

            }

        }

    }

//  End of File